/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineExternalUIInterface.h
virtual [FDelegateHandle](API\Runtime\Core\Delegates\FDelegateHandle) AddOnLoginFlowUIRequiredDelegate_Handle ( const [FOnLoginFlowUIRequiredDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnLoginFlowUIRequiredDelegate) & Delegate )